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tracing: Robustify wait loop
[linux-2.6/btrfs-unstable.git] / drivers / net / irda / ali-ircc.c
blobbefa45f809c32976470d2a9f072a5580a578f791
1 /*********************************************************************
2 *
3 * Filename: ali-ircc.h
4 * Version: 0.5
5 * Description: Driver for the ALI M1535D and M1543C FIR Controller
6 * Status: Experimental.
7 * Author: Benjamin Kong <benjamin_kong@ali.com.tw>
8 * Created at: 2000/10/16 03:46PM
9 * Modified at: 2001/1/3 02:55PM
10 * Modified by: Benjamin Kong <benjamin_kong@ali.com.tw>
11 * Modified at: 2003/11/6 and support for ALi south-bridge chipsets M1563
12 * Modified by: Clear Zhang <clear_zhang@ali.com.tw>
13 *
14 * Copyright (c) 2000 Benjamin Kong <benjamin_kong@ali.com.tw>
15 * All Rights Reserved
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
21 *
22 ********************************************************************/
23
24 #include <linux/module.h>
25 #include <linux/gfp.h>
26
27 #include <linux/kernel.h>
28 #include <linux/types.h>
29 #include <linux/skbuff.h>
30 #include <linux/netdevice.h>
31 #include <linux/ioport.h>
32 #include <linux/delay.h>
33 #include <linux/init.h>
34 #include <linux/interrupt.h>
35 #include <linux/rtnetlink.h>
36 #include <linux/serial_reg.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/platform_device.h>
39
40 #include <asm/io.h>
41 #include <asm/dma.h>
42 #include <asm/byteorder.h>
43
44 #include <net/irda/wrapper.h>
45 #include <net/irda/irda.h>
46 #include <net/irda/irda_device.h>
47
48 #include "ali-ircc.h"
49
50 #define CHIP_IO_EXTENT 8
51 #define BROKEN_DONGLE_ID
52
53 #define ALI_IRCC_DRIVER_NAME "ali-ircc"
54
55 /* Power Management */
56 static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state);
57 static int ali_ircc_resume(struct platform_device *dev);
58
59 static struct platform_driver ali_ircc_driver = {
60 .suspend = ali_ircc_suspend,
61 .resume = ali_ircc_resume,
62 .driver = {
63 .name = ALI_IRCC_DRIVER_NAME,
64 .owner = THIS_MODULE,
65 },
66 };
67
68 /* Module parameters */
69 static int qos_mtt_bits = 0x07; /* 1 ms or more */
70
71 /* Use BIOS settions by default, but user may supply module parameters */
72 static unsigned int io[] = { ~0, ~0, ~0, ~0 };
73 static unsigned int irq[] = { 0, 0, 0, 0 };
74 static unsigned int dma[] = { 0, 0, 0, 0 };
75
76 static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info);
77 static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info);
78 static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info);
79
80 /* These are the currently known ALi south-bridge chipsets, the only one difference
81 * is that M1543C doesn't support HP HDSL-3600
82 */
83 static ali_chip_t chips[] =
84 {
85 { "M1543", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x43, ali_ircc_probe_53, ali_ircc_init_43 },
86 { "M1535", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x53, ali_ircc_probe_53, ali_ircc_init_53 },
87 { "M1563", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x63, ali_ircc_probe_53, ali_ircc_init_53 },
88 { NULL }
89 };
90
91 /* Max 4 instances for now */
92 static struct ali_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
93
94 /* Dongle Types */
95 static char *dongle_types[] = {
96 "TFDS6000",
97 "HP HSDL-3600",
98 "HP HSDL-1100",
99 "No dongle connected",
100 };
101
102 /* Some prototypes */
103 static int ali_ircc_open(int i, chipio_t *info);
104
105 static int ali_ircc_close(struct ali_ircc_cb *self);
106
107 static int ali_ircc_setup(chipio_t *info);
108 static int ali_ircc_is_receiving(struct ali_ircc_cb *self);
109 static int ali_ircc_net_open(struct net_device *dev);
110 static int ali_ircc_net_close(struct net_device *dev);
111 static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
112 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud);
113
114 /* SIR function */
115 static netdev_tx_t ali_ircc_sir_hard_xmit(struct sk_buff *skb,
116 struct net_device *dev);
117 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self);
118 static void ali_ircc_sir_receive(struct ali_ircc_cb *self);
119 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self);
120 static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
121 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
122
123 /* FIR function */
124 static netdev_tx_t ali_ircc_fir_hard_xmit(struct sk_buff *skb,
125 struct net_device *dev);
126 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
127 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self);
128 static int ali_ircc_dma_receive(struct ali_ircc_cb *self);
129 static int ali_ircc_dma_receive_complete(struct ali_ircc_cb *self);
130 static int ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self);
131 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self);
132
133 /* My Function */
134 static int ali_ircc_read_dongle_id (int i, chipio_t *info);
135 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed);
136
137 /* ALi chip function */
138 static void SIR2FIR(int iobase);
139 static void FIR2SIR(int iobase);
140 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable);
141
142 /*
143 * Function ali_ircc_init ()
144 *
145 * Initialize chip. Find out whay kinds of chips we are dealing with
146 * and their configuration registers address
147 */
148 static int __init ali_ircc_init(void)
149 {
150 ali_chip_t *chip;
151 chipio_t info;
152 int ret;
153 int cfg, cfg_base;
154 int reg, revision;
155 int i = 0;
156
157 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
158
159 ret = platform_driver_register(&ali_ircc_driver);
160 if (ret) {
161 IRDA_ERROR("%s, Can't register driver!\n",
162 ALI_IRCC_DRIVER_NAME);
163 return ret;
164 }
165
166 ret = -ENODEV;
167
168 /* Probe for all the ALi chipsets we know about */
169 for (chip= chips; chip->name; chip++, i++)
170 {
171 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __func__, chip->name);
172
173 /* Try all config registers for this chip */
174 for (cfg=0; cfg<2; cfg++)
175 {
176 cfg_base = chip->cfg[cfg];
177 if (!cfg_base)
178 continue;
179
180 memset(&info, 0, sizeof(chipio_t));
181 info.cfg_base = cfg_base;
182 info.fir_base = io[i];
183 info.dma = dma[i];
184 info.irq = irq[i];
185
186
187 /* Enter Configuration */
188 outb(chip->entr1, cfg_base);
189 outb(chip->entr2, cfg_base);
190
191 /* Select Logical Device 5 Registers (UART2) */
192 outb(0x07, cfg_base);
193 outb(0x05, cfg_base+1);
194
195 /* Read Chip Identification Register */
196 outb(chip->cid_index, cfg_base);
197 reg = inb(cfg_base+1);
198
199 if (reg == chip->cid_value)
200 {
201 IRDA_DEBUG(2, "%s(), Chip found at 0x%03x\n", __func__, cfg_base);
202
203 outb(0x1F, cfg_base);
204 revision = inb(cfg_base+1);
205 IRDA_DEBUG(2, "%s(), Found %s chip, revision=%d\n", __func__,
206 chip->name, revision);
207
208 /*
209 * If the user supplies the base address, then
210 * we init the chip, if not we probe the values
211 * set by the BIOS
212 */
213 if (io[i] < 2000)
214 {
215 chip->init(chip, &info);
216 }
217 else
218 {
219 chip->probe(chip, &info);
220 }
221
222 if (ali_ircc_open(i, &info) == 0)
223 ret = 0;
224 i++;
225 }
226 else
227 {
228 IRDA_DEBUG(2, "%s(), No %s chip at 0x%03x\n", __func__, chip->name, cfg_base);
229 }
230 /* Exit configuration */
231 outb(0xbb, cfg_base);
232 }
233 }
234
235 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
236
237 if (ret)
238 platform_driver_unregister(&ali_ircc_driver);
239
240 return ret;
241 }
242
243 /*
244 * Function ali_ircc_cleanup ()
245 *
246 * Close all configured chips
247 *
248 */
249 static void __exit ali_ircc_cleanup(void)
250 {
251 int i;
252
253 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
254
255 for (i=0; i < ARRAY_SIZE(dev_self); i++) {
256 if (dev_self[i])
257 ali_ircc_close(dev_self[i]);
258 }
259
260 platform_driver_unregister(&ali_ircc_driver);
261
262 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
263 }
264
265 static const struct net_device_ops ali_ircc_sir_ops = {
266 .ndo_open = ali_ircc_net_open,
267 .ndo_stop = ali_ircc_net_close,
268 .ndo_start_xmit = ali_ircc_sir_hard_xmit,
269 .ndo_do_ioctl = ali_ircc_net_ioctl,
270 };
271
272 static const struct net_device_ops ali_ircc_fir_ops = {
273 .ndo_open = ali_ircc_net_open,
274 .ndo_stop = ali_ircc_net_close,
275 .ndo_start_xmit = ali_ircc_fir_hard_xmit,
276 .ndo_do_ioctl = ali_ircc_net_ioctl,
277 };
278
279 /*
280 * Function ali_ircc_open (int i, chipio_t *inf)
281 *
282 * Open driver instance
283 *
284 */
285 static int ali_ircc_open(int i, chipio_t *info)
286 {
287 struct net_device *dev;
288 struct ali_ircc_cb *self;
289 int dongle_id;
290 int err;
291
292 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
293
294 if (i >= ARRAY_SIZE(dev_self)) {
295 IRDA_ERROR("%s(), maximum number of supported chips reached!\n",
296 __func__);
297 return -ENOMEM;
298 }
299
300 /* Set FIR FIFO and DMA Threshold */
301 if ((ali_ircc_setup(info)) == -1)
302 return -1;
303
304 dev = alloc_irdadev(sizeof(*self));
305 if (dev == NULL) {
306 IRDA_ERROR("%s(), can't allocate memory for control block!\n",
307 __func__);
308 return -ENOMEM;
309 }
310
311 self = netdev_priv(dev);
312 self->netdev = dev;
313 spin_lock_init(&self->lock);
314
315 /* Need to store self somewhere */
316 dev_self[i] = self;
317 self->index = i;
318
319 /* Initialize IO */
320 self->io.cfg_base = info->cfg_base; /* In ali_ircc_probe_53 assign */
321 self->io.fir_base = info->fir_base; /* info->sir_base = info->fir_base */
322 self->io.sir_base = info->sir_base; /* ALi SIR and FIR use the same address */
323 self->io.irq = info->irq;
324 self->io.fir_ext = CHIP_IO_EXTENT;
325 self->io.dma = info->dma;
326 self->io.fifo_size = 16; /* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
327
328 /* Reserve the ioports that we need */
329 if (!request_region(self->io.fir_base, self->io.fir_ext,
330 ALI_IRCC_DRIVER_NAME)) {
331 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n", __func__,
332 self->io.fir_base);
333 err = -ENODEV;
334 goto err_out1;
335 }
336
337 /* Initialize QoS for this device */
338 irda_init_max_qos_capabilies(&self->qos);
339
340 /* The only value we must override it the baudrate */
341 self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
342 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
343
344 self->qos.min_turn_time.bits = qos_mtt_bits;
345
346 irda_qos_bits_to_value(&self->qos);
347
348 /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
349 self->rx_buff.truesize = 14384;
350 self->tx_buff.truesize = 14384;
351
352 /* Allocate memory if needed */
353 self->rx_buff.head =
354 dma_zalloc_coherent(NULL, self->rx_buff.truesize,
355 &self->rx_buff_dma, GFP_KERNEL);
356 if (self->rx_buff.head == NULL) {
357 err = -ENOMEM;
358 goto err_out2;
359 }
360
361 self->tx_buff.head =
362 dma_zalloc_coherent(NULL, self->tx_buff.truesize,
363 &self->tx_buff_dma, GFP_KERNEL);
364 if (self->tx_buff.head == NULL) {
365 err = -ENOMEM;
366 goto err_out3;
367 }
368
369 self->rx_buff.in_frame = FALSE;
370 self->rx_buff.state = OUTSIDE_FRAME;
371 self->tx_buff.data = self->tx_buff.head;
372 self->rx_buff.data = self->rx_buff.head;
373
374 /* Reset Tx queue info */
375 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
376 self->tx_fifo.tail = self->tx_buff.head;
377
378 /* Override the network functions we need to use */
379 dev->netdev_ops = &ali_ircc_sir_ops;
380
381 err = register_netdev(dev);
382 if (err) {
383 IRDA_ERROR("%s(), register_netdev() failed!\n", __func__);
384 goto err_out4;
385 }
386 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
387
388 /* Check dongle id */
389 dongle_id = ali_ircc_read_dongle_id(i, info);
390 IRDA_MESSAGE("%s(), %s, Found dongle: %s\n", __func__,
391 ALI_IRCC_DRIVER_NAME, dongle_types[dongle_id]);
392
393 self->io.dongle_id = dongle_id;
394
395 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
396
397 return 0;
398
399 err_out4:
400 dma_free_coherent(NULL, self->tx_buff.truesize,
401 self->tx_buff.head, self->tx_buff_dma);
402 err_out3:
403 dma_free_coherent(NULL, self->rx_buff.truesize,
404 self->rx_buff.head, self->rx_buff_dma);
405 err_out2:
406 release_region(self->io.fir_base, self->io.fir_ext);
407 err_out1:
408 dev_self[i] = NULL;
409 free_netdev(dev);
410 return err;
411 }
412
413
414 /*
415 * Function ali_ircc_close (self)
416 *
417 * Close driver instance
418 *
419 */
420 static int __exit ali_ircc_close(struct ali_ircc_cb *self)
421 {
422 int iobase;
423
424 IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __func__);
425
426 IRDA_ASSERT(self != NULL, return -1;);
427
428 iobase = self->io.fir_base;
429
430 /* Remove netdevice */
431 unregister_netdev(self->netdev);
432
433 /* Release the PORT that this driver is using */
434 IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", __func__, self->io.fir_base);
435 release_region(self->io.fir_base, self->io.fir_ext);
436
437 if (self->tx_buff.head)
438 dma_free_coherent(NULL, self->tx_buff.truesize,
439 self->tx_buff.head, self->tx_buff_dma);
440
441 if (self->rx_buff.head)
442 dma_free_coherent(NULL, self->rx_buff.truesize,
443 self->rx_buff.head, self->rx_buff_dma);
444
445 dev_self[self->index] = NULL;
446 free_netdev(self->netdev);
447
448 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
449
450 return 0;
451 }
452
453 /*
454 * Function ali_ircc_init_43 (chip, info)
455 *
456 * Initialize the ALi M1543 chip.
457 */
458 static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info)
459 {
460 /* All controller information like I/O address, DMA channel, IRQ
461 * are set by BIOS
462 */
463
464 return 0;
465 }
466
467 /*
468 * Function ali_ircc_init_53 (chip, info)
469 *
470 * Initialize the ALi M1535 chip.
471 */
472 static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info)
473 {
474 /* All controller information like I/O address, DMA channel, IRQ
475 * are set by BIOS
476 */
477
478 return 0;
479 }
480
481 /*
482 * Function ali_ircc_probe_53 (chip, info)
483 *
484 * Probes for the ALi M1535D or M1535
485 */
486 static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
487 {
488 int cfg_base = info->cfg_base;
489 int hi, low, reg;
490
491 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
492
493 /* Enter Configuration */
494 outb(chip->entr1, cfg_base);
495 outb(chip->entr2, cfg_base);
496
497 /* Select Logical Device 5 Registers (UART2) */
498 outb(0x07, cfg_base);
499 outb(0x05, cfg_base+1);
500
501 /* Read address control register */
502 outb(0x60, cfg_base);
503 hi = inb(cfg_base+1);
504 outb(0x61, cfg_base);
505 low = inb(cfg_base+1);
506 info->fir_base = (hi<<8) + low;
507
508 info->sir_base = info->fir_base;
509
510 IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __func__, info->fir_base);
511
512 /* Read IRQ control register */
513 outb(0x70, cfg_base);
514 reg = inb(cfg_base+1);
515 info->irq = reg & 0x0f;
516 IRDA_DEBUG(2, "%s(), probing irq=%d\n", __func__, info->irq);
517
518 /* Read DMA channel */
519 outb(0x74, cfg_base);
520 reg = inb(cfg_base+1);
521 info->dma = reg & 0x07;
522
523 if(info->dma == 0x04)
524 IRDA_WARNING("%s(), No DMA channel assigned !\n", __func__);
525 else
526 IRDA_DEBUG(2, "%s(), probing dma=%d\n", __func__, info->dma);
527
528 /* Read Enabled Status */
529 outb(0x30, cfg_base);
530 reg = inb(cfg_base+1);
531 info->enabled = (reg & 0x80) && (reg & 0x01);
532 IRDA_DEBUG(2, "%s(), probing enabled=%d\n", __func__, info->enabled);
533
534 /* Read Power Status */
535 outb(0x22, cfg_base);
536 reg = inb(cfg_base+1);
537 info->suspended = (reg & 0x20);
538 IRDA_DEBUG(2, "%s(), probing suspended=%d\n", __func__, info->suspended);
539
540 /* Exit configuration */
541 outb(0xbb, cfg_base);
542
543 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
544
545 return 0;
546 }
547
548 /*
549 * Function ali_ircc_setup (info)
550 *
551 * Set FIR FIFO and DMA Threshold
552 * Returns non-negative on success.
553 *
554 */
555 static int ali_ircc_setup(chipio_t *info)
556 {
557 unsigned char tmp;
558 int version;
559 int iobase = info->fir_base;
560
561 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
562
563 /* Locking comments :
564 * Most operations here need to be protected. We are called before
565 * the device instance is created in ali_ircc_open(), therefore
566 * nobody can bother us - Jean II */
567
568 /* Switch to FIR space */
569 SIR2FIR(iobase);
570
571 /* Master Reset */
572 outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
573
574 /* Read FIR ID Version Register */
575 switch_bank(iobase, BANK3);
576 version = inb(iobase+FIR_ID_VR);
577
578 /* Should be 0x00 in the M1535/M1535D */
579 if(version != 0x00)
580 {
581 IRDA_ERROR("%s, Wrong chip version %02x\n",
582 ALI_IRCC_DRIVER_NAME, version);
583 return -1;
584 }
585
586 /* Set FIR FIFO Threshold Register */
587 switch_bank(iobase, BANK1);
588 outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
589
590 /* Set FIR DMA Threshold Register */
591 outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
592
593 /* CRC enable */
594 switch_bank(iobase, BANK2);
595 outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
596
597 /* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
598
599 /* Switch to Bank 0 */
600 switch_bank(iobase, BANK0);
601
602 tmp = inb(iobase+FIR_LCR_B);
603 tmp &=~0x20; // disable SIP
604 tmp |= 0x80; // these two steps make RX mode
605 tmp &= 0xbf;
606 outb(tmp, iobase+FIR_LCR_B);
607
608 /* Disable Interrupt */
609 outb(0x00, iobase+FIR_IER);
610
611
612 /* Switch to SIR space */
613 FIR2SIR(iobase);
614
615 IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n",
616 ALI_IRCC_DRIVER_NAME);
617
618 /* Enable receive interrupts */
619 // outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
620 // Turn on the interrupts in ali_ircc_net_open
621
622 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
623
624 return 0;
625 }
626
627 /*
628 * Function ali_ircc_read_dongle_id (int index, info)
629 *
630 * Try to read dongle identification. This procedure needs to be executed
631 * once after power-on/reset. It also needs to be used whenever you suspect
632 * that the user may have plugged/unplugged the IrDA Dongle.
633 */
634 static int ali_ircc_read_dongle_id (int i, chipio_t *info)
635 {
636 int dongle_id, reg;
637 int cfg_base = info->cfg_base;
638
639 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
640
641 /* Enter Configuration */
642 outb(chips[i].entr1, cfg_base);
643 outb(chips[i].entr2, cfg_base);
644
645 /* Select Logical Device 5 Registers (UART2) */
646 outb(0x07, cfg_base);
647 outb(0x05, cfg_base+1);
648
649 /* Read Dongle ID */
650 outb(0xf0, cfg_base);
651 reg = inb(cfg_base+1);
652 dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
653 IRDA_DEBUG(2, "%s(), probing dongle_id=%d, dongle_types=%s\n", __func__,
654 dongle_id, dongle_types[dongle_id]);
655
656 /* Exit configuration */
657 outb(0xbb, cfg_base);
658
659 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
660
661 return dongle_id;
662 }
663
664 /*
665 * Function ali_ircc_interrupt (irq, dev_id, regs)
666 *
667 * An interrupt from the chip has arrived. Time to do some work
668 *
669 */
670 static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id)
671 {
672 struct net_device *dev = dev_id;
673 struct ali_ircc_cb *self;
674 int ret;
675
676 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
677
678 self = netdev_priv(dev);
679
680 spin_lock(&self->lock);
681
682 /* Dispatch interrupt handler for the current speed */
683 if (self->io.speed > 115200)
684 ret = ali_ircc_fir_interrupt(self);
685 else
686 ret = ali_ircc_sir_interrupt(self);
687
688 spin_unlock(&self->lock);
689
690 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
691 return ret;
692 }
693 /*
694 * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
695 *
696 * Handle MIR/FIR interrupt
697 *
698 */
699 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
700 {
701 __u8 eir, OldMessageCount;
702 int iobase, tmp;
703
704 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__);
705
706 iobase = self->io.fir_base;
707
708 switch_bank(iobase, BANK0);
709 self->InterruptID = inb(iobase+FIR_IIR);
710 self->BusStatus = inb(iobase+FIR_BSR);
711
712 OldMessageCount = (self->LineStatus + 1) & 0x07;
713 self->LineStatus = inb(iobase+FIR_LSR);
714 //self->ier = inb(iobase+FIR_IER); 2000/12/1 04:32PM
715 eir = self->InterruptID & self->ier; /* Mask out the interesting ones */
716
717 IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __func__,self->InterruptID);
718 IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __func__,self->LineStatus);
719 IRDA_DEBUG(1, "%s(), self->ier = %x\n", __func__,self->ier);
720 IRDA_DEBUG(1, "%s(), eir = %x\n", __func__,eir);
721
722 /* Disable interrupts */
723 SetCOMInterrupts(self, FALSE);
724
725 /* Tx or Rx Interrupt */
726
727 if (eir & IIR_EOM)
728 {
729 if (self->io.direction == IO_XMIT) /* TX */
730 {
731 IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __func__);
732
733 if(ali_ircc_dma_xmit_complete(self))
734 {
735 if (irda_device_txqueue_empty(self->netdev))
736 {
737 /* Prepare for receive */
738 ali_ircc_dma_receive(self);
739 self->ier = IER_EOM;
740 }
741 }
742 else
743 {
744 self->ier = IER_EOM;
745 }
746
747 }
748 else /* RX */
749 {
750 IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __func__);
751
752 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
753 {
754 self->rcvFramesOverflow = TRUE;
755 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ********\n", __func__);
756 }
757
758 if (ali_ircc_dma_receive_complete(self))
759 {
760 IRDA_DEBUG(1, "%s(), ******* receive complete ********\n", __func__);
761
762 self->ier = IER_EOM;
763 }
764 else
765 {
766 IRDA_DEBUG(1, "%s(), ******* Not receive complete ********\n", __func__);
767
768 self->ier = IER_EOM | IER_TIMER;
769 }
770
771 }
772 }
773 /* Timer Interrupt */
774 else if (eir & IIR_TIMER)
775 {
776 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
777 {
778 self->rcvFramesOverflow = TRUE;
779 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE *******\n", __func__);
780 }
781 /* Disable Timer */
782 switch_bank(iobase, BANK1);
783 tmp = inb(iobase+FIR_CR);
784 outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
785
786 /* Check if this is a Tx timer interrupt */
787 if (self->io.direction == IO_XMIT)
788 {
789 ali_ircc_dma_xmit(self);
790
791 /* Interrupt on EOM */
792 self->ier = IER_EOM;
793
794 }
795 else /* Rx */
796 {
797 if(ali_ircc_dma_receive_complete(self))
798 {
799 self->ier = IER_EOM;
800 }
801 else
802 {
803 self->ier = IER_EOM | IER_TIMER;
804 }
805 }
806 }
807
808 /* Restore Interrupt */
809 SetCOMInterrupts(self, TRUE);
810
811 IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __func__);
812 return IRQ_RETVAL(eir);
813 }
814
815 /*
816 * Function ali_ircc_sir_interrupt (irq, self, eir)
817 *
818 * Handle SIR interrupt
819 *
820 */
821 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
822 {
823 int iobase;
824 int iir, lsr;
825
826 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
827
828 iobase = self->io.sir_base;
829
830 iir = inb(iobase+UART_IIR) & UART_IIR_ID;
831 if (iir) {
832 /* Clear interrupt */
833 lsr = inb(iobase+UART_LSR);
834
835 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __func__,
836 iir, lsr, iobase);
837
838 switch (iir)
839 {
840 case UART_IIR_RLSI:
841 IRDA_DEBUG(2, "%s(), RLSI\n", __func__);
842 break;
843 case UART_IIR_RDI:
844 /* Receive interrupt */
845 ali_ircc_sir_receive(self);
846 break;
847 case UART_IIR_THRI:
848 if (lsr & UART_LSR_THRE)
849 {
850 /* Transmitter ready for data */
851 ali_ircc_sir_write_wakeup(self);
852 }
853 break;
854 default:
855 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __func__, iir);
856 break;
857 }
858
859 }
860
861
862 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
863
864 return IRQ_RETVAL(iir);
865 }
866
867
868 /*
869 * Function ali_ircc_sir_receive (self)
870 *
871 * Receive one frame from the infrared port
872 *
873 */
874 static void ali_ircc_sir_receive(struct ali_ircc_cb *self)
875 {
876 int boguscount = 0;
877 int iobase;
878
879 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
880 IRDA_ASSERT(self != NULL, return;);
881
882 iobase = self->io.sir_base;
883
884 /*
885 * Receive all characters in Rx FIFO, unwrap and unstuff them.
886 * async_unwrap_char will deliver all found frames
887 */
888 do {
889 async_unwrap_char(self->netdev, &self->netdev->stats, &self->rx_buff,
890 inb(iobase+UART_RX));
891
892 /* Make sure we don't stay here too long */
893 if (boguscount++ > 32) {
894 IRDA_DEBUG(2,"%s(), breaking!\n", __func__);
895 break;
896 }
897 } while (inb(iobase+UART_LSR) & UART_LSR_DR);
898
899 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
900 }
901
902 /*
903 * Function ali_ircc_sir_write_wakeup (tty)
904 *
905 * Called by the driver when there's room for more data. If we have
906 * more packets to send, we send them here.
907 *
908 */
909 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
910 {
911 int actual = 0;
912 int iobase;
913
914 IRDA_ASSERT(self != NULL, return;);
915
916 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
917
918 iobase = self->io.sir_base;
919
920 /* Finished with frame? */
921 if (self->tx_buff.len > 0)
922 {
923 /* Write data left in transmit buffer */
924 actual = ali_ircc_sir_write(iobase, self->io.fifo_size,
925 self->tx_buff.data, self->tx_buff.len);
926 self->tx_buff.data += actual;
927 self->tx_buff.len -= actual;
928 }
929 else
930 {
931 if (self->new_speed)
932 {
933 /* We must wait until all data are gone */
934 while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
935 IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __func__ );
936
937 IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __func__ , self->new_speed);
938 ali_ircc_change_speed(self, self->new_speed);
939 self->new_speed = 0;
940
941 // benjamin 2000/11/10 06:32PM
942 if (self->io.speed > 115200)
943 {
944 IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT\n", __func__ );
945
946 self->ier = IER_EOM;
947 // SetCOMInterrupts(self, TRUE);
948 return;
949 }
950 }
951 else
952 {
953 netif_wake_queue(self->netdev);
954 }
955
956 self->netdev->stats.tx_packets++;
957
958 /* Turn on receive interrupts */
959 outb(UART_IER_RDI, iobase+UART_IER);
960 }
961
962 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
963 }
964
965 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
966 {
967 struct net_device *dev = self->netdev;
968 int iobase;
969
970 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
971
972 IRDA_DEBUG(2, "%s(), setting speed = %d\n", __func__ , baud);
973
974 /* This function *must* be called with irq off and spin-lock.
975 * - Jean II */
976
977 iobase = self->io.fir_base;
978
979 SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
980
981 /* Go to MIR, FIR Speed */
982 if (baud > 115200)
983 {
984
985
986 ali_ircc_fir_change_speed(self, baud);
987
988 /* Install FIR xmit handler*/
989 dev->netdev_ops = &ali_ircc_fir_ops;
990
991 /* Enable Interuupt */
992 self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM
993
994 /* Be ready for incoming frames */
995 ali_ircc_dma_receive(self); // benajmin 2000/11/8 07:46PM not complete
996 }
997 /* Go to SIR Speed */
998 else
999 {
1000 ali_ircc_sir_change_speed(self, baud);
1001
1002 /* Install SIR xmit handler*/
1003 dev->netdev_ops = &ali_ircc_sir_ops;
1004 }
1005
1006
1007 SetCOMInterrupts(self, TRUE); // 2000/11/24 11:43AM
1008
1009 netif_wake_queue(self->netdev);
1010
1011 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1012 }
1013
1014 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
1015 {
1016
1017 int iobase;
1018 struct ali_ircc_cb *self = priv;
1019 struct net_device *dev;
1020
1021 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1022
1023 IRDA_ASSERT(self != NULL, return;);
1024
1025 dev = self->netdev;
1026 iobase = self->io.fir_base;
1027
1028 IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __func__ ,self->io.speed,baud);
1029
1030 /* Come from SIR speed */
1031 if(self->io.speed <=115200)
1032 {
1033 SIR2FIR(iobase);
1034 }
1035
1036 /* Update accounting for new speed */
1037 self->io.speed = baud;
1038
1039 // Set Dongle Speed mode
1040 ali_ircc_change_dongle_speed(self, baud);
1041
1042 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1043 }
1044
1045 /*
1046 * Function ali_sir_change_speed (self, speed)
1047 *
1048 * Set speed of IrDA port to specified baudrate
1049 *
1050 */
1051 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
1052 {
1053 struct ali_ircc_cb *self = priv;
1054 unsigned long flags;
1055 int iobase;
1056 int fcr; /* FIFO control reg */
1057 int lcr; /* Line control reg */
1058 int divisor;
1059
1060 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1061
1062 IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __func__ , speed);
1063
1064 IRDA_ASSERT(self != NULL, return;);
1065
1066 iobase = self->io.sir_base;
1067
1068 /* Come from MIR or FIR speed */
1069 if(self->io.speed >115200)
1070 {
1071 // Set Dongle Speed mode first
1072 ali_ircc_change_dongle_speed(self, speed);
1073
1074 FIR2SIR(iobase);
1075 }
1076
1077 // Clear Line and Auxiluary status registers 2000/11/24 11:47AM
1078
1079 inb(iobase+UART_LSR);
1080 inb(iobase+UART_SCR);
1081
1082 /* Update accounting for new speed */
1083 self->io.speed = speed;
1084
1085 spin_lock_irqsave(&self->lock, flags);
1086
1087 divisor = 115200/speed;
1088
1089 fcr = UART_FCR_ENABLE_FIFO;
1090
1091 /*
1092 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1093 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1094 * about this timeout since it will always be fast enough.
1095 */
1096 if (self->io.speed < 38400)
1097 fcr |= UART_FCR_TRIGGER_1;
1098 else
1099 fcr |= UART_FCR_TRIGGER_14;
1100
1101 /* IrDA ports use 8N1 */
1102 lcr = UART_LCR_WLEN8;
1103
1104 outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
1105 outb(divisor & 0xff, iobase+UART_DLL); /* Set speed */
1106 outb(divisor >> 8, iobase+UART_DLM);
1107 outb(lcr, iobase+UART_LCR); /* Set 8N1 */
1108 outb(fcr, iobase+UART_FCR); /* Enable FIFO's */
1109
1110 /* without this, the connection will be broken after come back from FIR speed,
1111 but with this, the SIR connection is harder to established */
1112 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
1113
1114 spin_unlock_irqrestore(&self->lock, flags);
1115
1116 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1117 }
1118
1119 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
1120 {
1121
1122 struct ali_ircc_cb *self = priv;
1123 int iobase,dongle_id;
1124 int tmp = 0;
1125
1126 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1127
1128 iobase = self->io.fir_base; /* or iobase = self->io.sir_base; */
1129 dongle_id = self->io.dongle_id;
1130
1131 /* We are already locked, no need to do it again */
1132
1133 IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __func__ , dongle_types[dongle_id], speed);
1134
1135 switch_bank(iobase, BANK2);
1136 tmp = inb(iobase+FIR_IRDA_CR);
1137
1138 /* IBM type dongle */
1139 if(dongle_id == 0)
1140 {
1141 if(speed == 4000000)
1142 {
1143 // __ __
1144 // SD/MODE __| |__ __
1145 // __ __
1146 // IRTX __ __| |__
1147 // T1 T2 T3 T4 T5
1148
1149 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1150 tmp |= IRDA_CR_CRC; // CRC=1
1151
1152 switch_bank(iobase, BANK2);
1153 outb(tmp, iobase+FIR_IRDA_CR);
1154
1155 // T1 -> SD/MODE:0 IRTX:0
1156 tmp &= ~0x09;
1157 tmp |= 0x02;
1158 outb(tmp, iobase+FIR_IRDA_CR);
1159 udelay(2);
1160
1161 // T2 -> SD/MODE:1 IRTX:0
1162 tmp &= ~0x01;
1163 tmp |= 0x0a;
1164 outb(tmp, iobase+FIR_IRDA_CR);
1165 udelay(2);
1166
1167 // T3 -> SD/MODE:1 IRTX:1
1168 tmp |= 0x0b;
1169 outb(tmp, iobase+FIR_IRDA_CR);
1170 udelay(2);
1171
1172 // T4 -> SD/MODE:0 IRTX:1
1173 tmp &= ~0x08;
1174 tmp |= 0x03;
1175 outb(tmp, iobase+FIR_IRDA_CR);
1176 udelay(2);
1177
1178 // T5 -> SD/MODE:0 IRTX:0
1179 tmp &= ~0x09;
1180 tmp |= 0x02;
1181 outb(tmp, iobase+FIR_IRDA_CR);
1182 udelay(2);
1183
1184 // reset -> Normal TX output Signal
1185 outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1186 }
1187 else /* speed <=1152000 */
1188 {
1189 // __
1190 // SD/MODE __| |__
1191 //
1192 // IRTX ________
1193 // T1 T2 T3
1194
1195 /* MIR 115200, 57600 */
1196 if (speed==1152000)
1197 {
1198 tmp |= 0xA0; //HDLC=1, 1.152Mbps=1
1199 }
1200 else
1201 {
1202 tmp &=~0x80; //HDLC 0.576Mbps
1203 tmp |= 0x20; //HDLC=1,
1204 }
1205
1206 tmp |= IRDA_CR_CRC; // CRC=1
1207
1208 switch_bank(iobase, BANK2);
1209 outb(tmp, iobase+FIR_IRDA_CR);
1210
1211 /* MIR 115200, 57600 */
1212
1213 //switch_bank(iobase, BANK2);
1214 // T1 -> SD/MODE:0 IRTX:0
1215 tmp &= ~0x09;
1216 tmp |= 0x02;
1217 outb(tmp, iobase+FIR_IRDA_CR);
1218 udelay(2);
1219
1220 // T2 -> SD/MODE:1 IRTX:0
1221 tmp &= ~0x01;
1222 tmp |= 0x0a;
1223 outb(tmp, iobase+FIR_IRDA_CR);
1224
1225 // T3 -> SD/MODE:0 IRTX:0
1226 tmp &= ~0x09;
1227 tmp |= 0x02;
1228 outb(tmp, iobase+FIR_IRDA_CR);
1229 udelay(2);
1230
1231 // reset -> Normal TX output Signal
1232 outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1233 }
1234 }
1235 else if (dongle_id == 1) /* HP HDSL-3600 */
1236 {
1237 switch(speed)
1238 {
1239 case 4000000:
1240 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1241 break;
1242
1243 case 1152000:
1244 tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
1245 break;
1246
1247 case 576000:
1248 tmp &=~0x80; // HDLC 0.576Mbps
1249 tmp |= 0x20; // HDLC=1,
1250 break;
1251 }
1252
1253 tmp |= IRDA_CR_CRC; // CRC=1
1254
1255 switch_bank(iobase, BANK2);
1256 outb(tmp, iobase+FIR_IRDA_CR);
1257 }
1258 else /* HP HDSL-1100 */
1259 {
1260 if(speed <= 115200) /* SIR */
1261 {
1262
1263 tmp &= ~IRDA_CR_FIR_SIN; // HP sin select = 0
1264
1265 switch_bank(iobase, BANK2);
1266 outb(tmp, iobase+FIR_IRDA_CR);
1267 }
1268 else /* MIR FIR */
1269 {
1270
1271 switch(speed)
1272 {
1273 case 4000000:
1274 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1275 break;
1276
1277 case 1152000:
1278 tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
1279 break;
1280
1281 case 576000:
1282 tmp &=~0x80; // HDLC 0.576Mbps
1283 tmp |= 0x20; // HDLC=1,
1284 break;
1285 }
1286
1287 tmp |= IRDA_CR_CRC; // CRC=1
1288 tmp |= IRDA_CR_FIR_SIN; // HP sin select = 1
1289
1290 switch_bank(iobase, BANK2);
1291 outb(tmp, iobase+FIR_IRDA_CR);
1292 }
1293 }
1294
1295 switch_bank(iobase, BANK0);
1296
1297 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1298 }
1299
1300 /*
1301 * Function ali_ircc_sir_write (driver)
1302 *
1303 * Fill Tx FIFO with transmit data
1304 *
1305 */
1306 static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1307 {
1308 int actual = 0;
1309
1310 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1311
1312 /* Tx FIFO should be empty! */
1313 if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
1314 IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __func__ );
1315 return 0;
1316 }
1317
1318 /* Fill FIFO with current frame */
1319 while ((fifo_size-- > 0) && (actual < len)) {
1320 /* Transmit next byte */
1321 outb(buf[actual], iobase+UART_TX);
1322
1323 actual++;
1324 }
1325
1326 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1327 return actual;
1328 }
1329
1330 /*
1331 * Function ali_ircc_net_open (dev)
1332 *
1333 * Start the device
1334 *
1335 */
1336 static int ali_ircc_net_open(struct net_device *dev)
1337 {
1338 struct ali_ircc_cb *self;
1339 int iobase;
1340 char hwname[32];
1341
1342 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1343
1344 IRDA_ASSERT(dev != NULL, return -1;);
1345
1346 self = netdev_priv(dev);
1347
1348 IRDA_ASSERT(self != NULL, return 0;);
1349
1350 iobase = self->io.fir_base;
1351
1352 /* Request IRQ and install Interrupt Handler */
1353 if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev))
1354 {
1355 IRDA_WARNING("%s, unable to allocate irq=%d\n",
1356 ALI_IRCC_DRIVER_NAME,
1357 self->io.irq);
1358 return -EAGAIN;
1359 }
1360
1361 /*
1362 * Always allocate the DMA channel after the IRQ, and clean up on
1363 * failure.
1364 */
1365 if (request_dma(self->io.dma, dev->name)) {
1366 IRDA_WARNING("%s, unable to allocate dma=%d\n",
1367 ALI_IRCC_DRIVER_NAME,
1368 self->io.dma);
1369 free_irq(self->io.irq, dev);
1370 return -EAGAIN;
1371 }
1372
1373 /* Turn on interrups */
1374 outb(UART_IER_RDI , iobase+UART_IER);
1375
1376 /* Ready to play! */
1377 netif_start_queue(dev); //benjamin by irport
1378
1379 /* Give self a hardware name */
1380 sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
1381
1382 /*
1383 * Open new IrLAP layer instance, now that everything should be
1384 * initialized properly
1385 */
1386 self->irlap = irlap_open(dev, &self->qos, hwname);
1387
1388 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1389
1390 return 0;
1391 }
1392
1393 /*
1394 * Function ali_ircc_net_close (dev)
1395 *
1396 * Stop the device
1397 *
1398 */
1399 static int ali_ircc_net_close(struct net_device *dev)
1400 {
1401
1402 struct ali_ircc_cb *self;
1403 //int iobase;
1404
1405 IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __func__ );
1406
1407 IRDA_ASSERT(dev != NULL, return -1;);
1408
1409 self = netdev_priv(dev);
1410 IRDA_ASSERT(self != NULL, return 0;);
1411
1412 /* Stop device */
1413 netif_stop_queue(dev);
1414
1415 /* Stop and remove instance of IrLAP */
1416 if (self->irlap)
1417 irlap_close(self->irlap);
1418 self->irlap = NULL;
1419
1420 disable_dma(self->io.dma);
1421
1422 /* Disable interrupts */
1423 SetCOMInterrupts(self, FALSE);
1424
1425 free_irq(self->io.irq, dev);
1426 free_dma(self->io.dma);
1427
1428 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1429
1430 return 0;
1431 }
1432
1433 /*
1434 * Function ali_ircc_fir_hard_xmit (skb, dev)
1435 *
1436 * Transmit the frame
1437 *
1438 */
1439 static netdev_tx_t ali_ircc_fir_hard_xmit(struct sk_buff *skb,
1440 struct net_device *dev)
1441 {
1442 struct ali_ircc_cb *self;
1443 unsigned long flags;
1444 int iobase;
1445 __u32 speed;
1446 int mtt, diff;
1447
1448 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1449
1450 self = netdev_priv(dev);
1451 iobase = self->io.fir_base;
1452
1453 netif_stop_queue(dev);
1454
1455 /* Make sure tests *& speed change are atomic */
1456 spin_lock_irqsave(&self->lock, flags);
1457
1458 /* Note : you should make sure that speed changes are not going
1459 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1460 * details - Jean II */
1461
1462 /* Check if we need to change the speed */
1463 speed = irda_get_next_speed(skb);
1464 if ((speed != self->io.speed) && (speed != -1)) {
1465 /* Check for empty frame */
1466 if (!skb->len) {
1467 ali_ircc_change_speed(self, speed);
1468 dev->trans_start = jiffies;
1469 spin_unlock_irqrestore(&self->lock, flags);
1470 dev_kfree_skb(skb);
1471 return NETDEV_TX_OK;
1472 } else
1473 self->new_speed = speed;
1474 }
1475
1476 /* Register and copy this frame to DMA memory */
1477 self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1478 self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1479 self->tx_fifo.tail += skb->len;
1480
1481 dev->stats.tx_bytes += skb->len;
1482
1483 skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
1484 skb->len);
1485 self->tx_fifo.len++;
1486 self->tx_fifo.free++;
1487
1488 /* Start transmit only if there is currently no transmit going on */
1489 if (self->tx_fifo.len == 1)
1490 {
1491 /* Check if we must wait the min turn time or not */
1492 mtt = irda_get_mtt(skb);
1493
1494 if (mtt)
1495 {
1496 /* Check how much time we have used already */
1497 do_gettimeofday(&self->now);
1498
1499 diff = self->now.tv_usec - self->stamp.tv_usec;
1500 /* self->stamp is set from ali_ircc_dma_receive_complete() */
1501
1502 IRDA_DEBUG(1, "%s(), ******* diff = %d *******\n", __func__ , diff);
1503
1504 if (diff < 0)
1505 diff += 1000000;
1506
1507 /* Check if the mtt is larger than the time we have
1508 * already used by all the protocol processing
1509 */
1510 if (mtt > diff)
1511 {
1512 mtt -= diff;
1513
1514 /*
1515 * Use timer if delay larger than 1000 us, and
1516 * use udelay for smaller values which should
1517 * be acceptable
1518 */
1519 if (mtt > 500)
1520 {
1521 /* Adjust for timer resolution */
1522 mtt = (mtt+250) / 500; /* 4 discard, 5 get advanced, Let's round off */
1523
1524 IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __func__ , mtt);
1525
1526 /* Setup timer */
1527 if (mtt == 1) /* 500 us */
1528 {
1529 switch_bank(iobase, BANK1);
1530 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
1531 }
1532 else if (mtt == 2) /* 1 ms */
1533 {
1534 switch_bank(iobase, BANK1);
1535 outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
1536 }
1537 else /* > 2ms -> 4ms */
1538 {
1539 switch_bank(iobase, BANK1);
1540 outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
1541 }
1542
1543
1544 /* Start timer */
1545 outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1546 self->io.direction = IO_XMIT;
1547
1548 /* Enable timer interrupt */
1549 self->ier = IER_TIMER;
1550 SetCOMInterrupts(self, TRUE);
1551
1552 /* Timer will take care of the rest */
1553 goto out;
1554 }
1555 else
1556 udelay(mtt);
1557 } // if (if (mtt > diff)
1558 }// if (mtt)
1559
1560 /* Enable EOM interrupt */
1561 self->ier = IER_EOM;
1562 SetCOMInterrupts(self, TRUE);
1563
1564 /* Transmit frame */
1565 ali_ircc_dma_xmit(self);
1566 } // if (self->tx_fifo.len == 1)
1567
1568 out:
1569
1570 /* Not busy transmitting anymore if window is not full */
1571 if (self->tx_fifo.free < MAX_TX_WINDOW)
1572 netif_wake_queue(self->netdev);
1573
1574 /* Restore bank register */
1575 switch_bank(iobase, BANK0);
1576
1577 dev->trans_start = jiffies;
1578 spin_unlock_irqrestore(&self->lock, flags);
1579 dev_kfree_skb(skb);
1580
1581 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1582 return NETDEV_TX_OK;
1583 }
1584
1585
1586 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
1587 {
1588 int iobase, tmp;
1589 unsigned char FIFO_OPTI, Hi, Lo;
1590
1591
1592 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1593
1594 iobase = self->io.fir_base;
1595
1596 /* FIFO threshold , this method comes from NDIS5 code */
1597
1598 if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
1599 FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
1600 else
1601 FIFO_OPTI = TX_FIFO_Threshold;
1602
1603 /* Disable DMA */
1604 switch_bank(iobase, BANK1);
1605 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1606
1607 self->io.direction = IO_XMIT;
1608
1609 irda_setup_dma(self->io.dma,
1610 ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1611 self->tx_buff.head) + self->tx_buff_dma,
1612 self->tx_fifo.queue[self->tx_fifo.ptr].len,
1613 DMA_TX_MODE);
1614
1615 /* Reset Tx FIFO */
1616 switch_bank(iobase, BANK0);
1617 outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1618
1619 /* Set Tx FIFO threshold */
1620 if (self->fifo_opti_buf!=FIFO_OPTI)
1621 {
1622 switch_bank(iobase, BANK1);
1623 outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
1624 self->fifo_opti_buf=FIFO_OPTI;
1625 }
1626
1627 /* Set Tx DMA threshold */
1628 switch_bank(iobase, BANK1);
1629 outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
1630
1631 /* Set max Tx frame size */
1632 Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
1633 Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
1634 switch_bank(iobase, BANK2);
1635 outb(Hi, iobase+FIR_TX_DSR_HI);
1636 outb(Lo, iobase+FIR_TX_DSR_LO);
1637
1638 /* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
1639 switch_bank(iobase, BANK0);
1640 tmp = inb(iobase+FIR_LCR_B);
1641 tmp &= ~0x20; // Disable SIP
1642 outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
1643 IRDA_DEBUG(1, "%s(), *** Change to TX mode: FIR_LCR_B = 0x%x ***\n", __func__ , inb(iobase+FIR_LCR_B));
1644
1645 outb(0, iobase+FIR_LSR);
1646
1647 /* Enable DMA and Burst Mode */
1648 switch_bank(iobase, BANK1);
1649 outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1650
1651 switch_bank(iobase, BANK0);
1652
1653 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1654 }
1655
1656 static int ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
1657 {
1658 int iobase;
1659 int ret = TRUE;
1660
1661 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1662
1663 iobase = self->io.fir_base;
1664
1665 /* Disable DMA */
1666 switch_bank(iobase, BANK1);
1667 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1668
1669 /* Check for underrun! */
1670 switch_bank(iobase, BANK0);
1671 if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
1672
1673 {
1674 IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __func__);
1675 self->netdev->stats.tx_errors++;
1676 self->netdev->stats.tx_fifo_errors++;
1677 }
1678 else
1679 {
1680 self->netdev->stats.tx_packets++;
1681 }
1682
1683 /* Check if we need to change the speed */
1684 if (self->new_speed)
1685 {
1686 ali_ircc_change_speed(self, self->new_speed);
1687 self->new_speed = 0;
1688 }
1689
1690 /* Finished with this frame, so prepare for next */
1691 self->tx_fifo.ptr++;
1692 self->tx_fifo.len--;
1693
1694 /* Any frames to be sent back-to-back? */
1695 if (self->tx_fifo.len)
1696 {
1697 ali_ircc_dma_xmit(self);
1698
1699 /* Not finished yet! */
1700 ret = FALSE;
1701 }
1702 else
1703 { /* Reset Tx FIFO info */
1704 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1705 self->tx_fifo.tail = self->tx_buff.head;
1706 }
1707
1708 /* Make sure we have room for more frames */
1709 if (self->tx_fifo.free < MAX_TX_WINDOW) {
1710 /* Not busy transmitting anymore */
1711 /* Tell the network layer, that we can accept more frames */
1712 netif_wake_queue(self->netdev);
1713 }
1714
1715 switch_bank(iobase, BANK0);
1716
1717 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1718 return ret;
1719 }
1720
1721 /*
1722 * Function ali_ircc_dma_receive (self)
1723 *
1724 * Get ready for receiving a frame. The device will initiate a DMA
1725 * if it starts to receive a frame.
1726 *
1727 */
1728 static int ali_ircc_dma_receive(struct ali_ircc_cb *self)
1729 {
1730 int iobase, tmp;
1731
1732 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1733
1734 iobase = self->io.fir_base;
1735
1736 /* Reset Tx FIFO info */
1737 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1738 self->tx_fifo.tail = self->tx_buff.head;
1739
1740 /* Disable DMA */
1741 switch_bank(iobase, BANK1);
1742 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1743
1744 /* Reset Message Count */
1745 switch_bank(iobase, BANK0);
1746 outb(0x07, iobase+FIR_LSR);
1747
1748 self->rcvFramesOverflow = FALSE;
1749
1750 self->LineStatus = inb(iobase+FIR_LSR) ;
1751
1752 /* Reset Rx FIFO info */
1753 self->io.direction = IO_RECV;
1754 self->rx_buff.data = self->rx_buff.head;
1755
1756 /* Reset Rx FIFO */
1757 // switch_bank(iobase, BANK0);
1758 outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1759
1760 self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1761 self->st_fifo.tail = self->st_fifo.head = 0;
1762
1763 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1764 DMA_RX_MODE);
1765
1766 /* Set Receive Mode,Brick Wall */
1767 //switch_bank(iobase, BANK0);
1768 tmp = inb(iobase+FIR_LCR_B);
1769 outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
1770 IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x ***\n", __func__ , inb(iobase+FIR_LCR_B));
1771
1772 /* Set Rx Threshold */
1773 switch_bank(iobase, BANK1);
1774 outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
1775 outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
1776
1777 /* Enable DMA and Burst Mode */
1778 // switch_bank(iobase, BANK1);
1779 outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1780
1781 switch_bank(iobase, BANK0);
1782 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1783 return 0;
1784 }
1785
1786 static int ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
1787 {
1788 struct st_fifo *st_fifo;
1789 struct sk_buff *skb;
1790 __u8 status, MessageCount;
1791 int len, i, iobase, val;
1792
1793 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1794
1795 st_fifo = &self->st_fifo;
1796 iobase = self->io.fir_base;
1797
1798 switch_bank(iobase, BANK0);
1799 MessageCount = inb(iobase+ FIR_LSR)&0x07;
1800
1801 if (MessageCount > 0)
1802 IRDA_DEBUG(0, "%s(), Message count = %d,\n", __func__ , MessageCount);
1803
1804 for (i=0; i<=MessageCount; i++)
1805 {
1806 /* Bank 0 */
1807 switch_bank(iobase, BANK0);
1808 status = inb(iobase+FIR_LSR);
1809
1810 switch_bank(iobase, BANK2);
1811 len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
1812 len = len << 8;
1813 len |= inb(iobase+FIR_RX_DSR_LO);
1814
1815 IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __func__ , len);
1816 IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __func__ , status);
1817
1818 if (st_fifo->tail >= MAX_RX_WINDOW) {
1819 IRDA_DEBUG(0, "%s(), window is full!\n", __func__ );
1820 continue;
1821 }
1822
1823 st_fifo->entries[st_fifo->tail].status = status;
1824 st_fifo->entries[st_fifo->tail].len = len;
1825 st_fifo->pending_bytes += len;
1826 st_fifo->tail++;
1827 st_fifo->len++;
1828 }
1829
1830 for (i=0; i<=MessageCount; i++)
1831 {
1832 /* Get first entry */
1833 status = st_fifo->entries[st_fifo->head].status;
1834 len = st_fifo->entries[st_fifo->head].len;
1835 st_fifo->pending_bytes -= len;
1836 st_fifo->head++;
1837 st_fifo->len--;
1838
1839 /* Check for errors */
1840 if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))
1841 {
1842 IRDA_DEBUG(0,"%s(), ************* RX Errors ************\n", __func__ );
1843
1844 /* Skip frame */
1845 self->netdev->stats.rx_errors++;
1846
1847 self->rx_buff.data += len;
1848
1849 if (status & LSR_FIFO_UR)
1850 {
1851 self->netdev->stats.rx_frame_errors++;
1852 IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************\n", __func__ );
1853 }
1854 if (status & LSR_FRAME_ERROR)
1855 {
1856 self->netdev->stats.rx_frame_errors++;
1857 IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************\n", __func__ );
1858 }
1859
1860 if (status & LSR_CRC_ERROR)
1861 {
1862 self->netdev->stats.rx_crc_errors++;
1863 IRDA_DEBUG(0,"%s(), ************* CRC Errors ************\n", __func__ );
1864 }
1865
1866 if(self->rcvFramesOverflow)
1867 {
1868 self->netdev->stats.rx_frame_errors++;
1869 IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************\n", __func__ );
1870 }
1871 if(len == 0)
1872 {
1873 self->netdev->stats.rx_frame_errors++;
1874 IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 *********\n", __func__ );
1875 }
1876 }
1877 else
1878 {
1879
1880 if (st_fifo->pending_bytes < 32)
1881 {
1882 switch_bank(iobase, BANK0);
1883 val = inb(iobase+FIR_BSR);
1884 if ((val& BSR_FIFO_NOT_EMPTY)== 0x80)
1885 {
1886 IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************\n", __func__ );
1887
1888 /* Put this entry back in fifo */
1889 st_fifo->head--;
1890 st_fifo->len++;
1891 st_fifo->pending_bytes += len;
1892 st_fifo->entries[st_fifo->head].status = status;
1893 st_fifo->entries[st_fifo->head].len = len;
1894
1895 /*
1896 * DMA not finished yet, so try again
1897 * later, set timer value, resolution
1898 * 500 us
1899 */
1900
1901 switch_bank(iobase, BANK1);
1902 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
1903
1904 /* Enable Timer */
1905 outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1906
1907 return FALSE; /* I'll be back! */
1908 }
1909 }
1910
1911 /*
1912 * Remember the time we received this frame, so we can
1913 * reduce the min turn time a bit since we will know
1914 * how much time we have used for protocol processing
1915 */
1916 do_gettimeofday(&self->stamp);
1917
1918 skb = dev_alloc_skb(len+1);
1919 if (skb == NULL)
1920 {
1921 IRDA_WARNING("%s(), memory squeeze, "
1922 "dropping frame.\n",
1923 __func__);
1924 self->netdev->stats.rx_dropped++;
1925
1926 return FALSE;
1927 }
1928
1929 /* Make sure IP header gets aligned */
1930 skb_reserve(skb, 1);
1931
1932 /* Copy frame without CRC, CRC is removed by hardware*/
1933 skb_put(skb, len);
1934 skb_copy_to_linear_data(skb, self->rx_buff.data, len);
1935
1936 /* Move to next frame */
1937 self->rx_buff.data += len;
1938 self->netdev->stats.rx_bytes += len;
1939 self->netdev->stats.rx_packets++;
1940
1941 skb->dev = self->netdev;
1942 skb_reset_mac_header(skb);
1943 skb->protocol = htons(ETH_P_IRDA);
1944 netif_rx(skb);
1945 }
1946 }
1947
1948 switch_bank(iobase, BANK0);
1949
1950 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1951 return TRUE;
1952 }
1953
1954
1955
1956 /*
1957 * Function ali_ircc_sir_hard_xmit (skb, dev)
1958 *
1959 * Transmit the frame!
1960 *
1961 */
1962 static netdev_tx_t ali_ircc_sir_hard_xmit(struct sk_buff *skb,
1963 struct net_device *dev)
1964 {
1965 struct ali_ircc_cb *self;
1966 unsigned long flags;
1967 int iobase;
1968 __u32 speed;
1969
1970 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1971
1972 IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
1973
1974 self = netdev_priv(dev);
1975 IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
1976
1977 iobase = self->io.sir_base;
1978
1979 netif_stop_queue(dev);
1980
1981 /* Make sure tests *& speed change are atomic */
1982 spin_lock_irqsave(&self->lock, flags);
1983
1984 /* Note : you should make sure that speed changes are not going
1985 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1986 * details - Jean II */
1987
1988 /* Check if we need to change the speed */
1989 speed = irda_get_next_speed(skb);
1990 if ((speed != self->io.speed) && (speed != -1)) {
1991 /* Check for empty frame */
1992 if (!skb->len) {
1993 ali_ircc_change_speed(self, speed);
1994 dev->trans_start = jiffies;
1995 spin_unlock_irqrestore(&self->lock, flags);
1996 dev_kfree_skb(skb);
1997 return NETDEV_TX_OK;
1998 } else
1999 self->new_speed = speed;
2000 }
2001
2002 /* Init tx buffer */
2003 self->tx_buff.data = self->tx_buff.head;
2004
2005 /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
2006 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
2007 self->tx_buff.truesize);
2008
2009 self->netdev->stats.tx_bytes += self->tx_buff.len;
2010
2011 /* Turn on transmit finished interrupt. Will fire immediately! */
2012 outb(UART_IER_THRI, iobase+UART_IER);
2013
2014 dev->trans_start = jiffies;
2015 spin_unlock_irqrestore(&self->lock, flags);
2016
2017 dev_kfree_skb(skb);
2018
2019 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2020
2021 return NETDEV_TX_OK;
2022 }
2023
2024
2025 /*
2026 * Function ali_ircc_net_ioctl (dev, rq, cmd)
2027 *
2028 * Process IOCTL commands for this device
2029 *
2030 */
2031 static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2032 {
2033 struct if_irda_req *irq = (struct if_irda_req *) rq;
2034 struct ali_ircc_cb *self;
2035 unsigned long flags;
2036 int ret = 0;
2037
2038 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
2039
2040 IRDA_ASSERT(dev != NULL, return -1;);
2041
2042 self = netdev_priv(dev);
2043
2044 IRDA_ASSERT(self != NULL, return -1;);
2045
2046 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__ , dev->name, cmd);
2047
2048 switch (cmd) {
2049 case SIOCSBANDWIDTH: /* Set bandwidth */
2050 IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __func__ );
2051 /*
2052 * This function will also be used by IrLAP to change the
2053 * speed, so we still must allow for speed change within
2054 * interrupt context.
2055 */
2056 if (!in_interrupt() && !capable(CAP_NET_ADMIN))
2057 return -EPERM;
2058
2059 spin_lock_irqsave(&self->lock, flags);
2060 ali_ircc_change_speed(self, irq->ifr_baudrate);
2061 spin_unlock_irqrestore(&self->lock, flags);
2062 break;
2063 case SIOCSMEDIABUSY: /* Set media busy */
2064 IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __func__ );
2065 if (!capable(CAP_NET_ADMIN))
2066 return -EPERM;
2067 irda_device_set_media_busy(self->netdev, TRUE);
2068 break;
2069 case SIOCGRECEIVING: /* Check if we are receiving right now */
2070 IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __func__ );
2071 /* This is protected */
2072 irq->ifr_receiving = ali_ircc_is_receiving(self);
2073 break;
2074 default:
2075 ret = -EOPNOTSUPP;
2076 }
2077
2078 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2079
2080 return ret;
2081 }
2082
2083 /*
2084 * Function ali_ircc_is_receiving (self)
2085 *
2086 * Return TRUE is we are currently receiving a frame
2087 *
2088 */
2089 static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
2090 {
2091 unsigned long flags;
2092 int status = FALSE;
2093 int iobase;
2094
2095 IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __func__ );
2096
2097 IRDA_ASSERT(self != NULL, return FALSE;);
2098
2099 spin_lock_irqsave(&self->lock, flags);
2100
2101 if (self->io.speed > 115200)
2102 {
2103 iobase = self->io.fir_base;
2104
2105 switch_bank(iobase, BANK1);
2106 if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)
2107 {
2108 /* We are receiving something */
2109 IRDA_DEBUG(1, "%s(), We are receiving something\n", __func__ );
2110 status = TRUE;
2111 }
2112 switch_bank(iobase, BANK0);
2113 }
2114 else
2115 {
2116 status = (self->rx_buff.state != OUTSIDE_FRAME);
2117 }
2118
2119 spin_unlock_irqrestore(&self->lock, flags);
2120
2121 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2122
2123 return status;
2124 }
2125
2126 static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
2127 {
2128 struct ali_ircc_cb *self = platform_get_drvdata(dev);
2129
2130 IRDA_MESSAGE("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);
2131
2132 if (self->io.suspended)
2133 return 0;
2134
2135 ali_ircc_net_close(self->netdev);
2136
2137 self->io.suspended = 1;
2138
2139 return 0;
2140 }
2141
2142 static int ali_ircc_resume(struct platform_device *dev)
2143 {
2144 struct ali_ircc_cb *self = platform_get_drvdata(dev);
2145
2146 if (!self->io.suspended)
2147 return 0;
2148
2149 ali_ircc_net_open(self->netdev);
2150
2151 IRDA_MESSAGE("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);
2152
2153 self->io.suspended = 0;
2154
2155 return 0;
2156 }
2157
2158 /* ALi Chip Function */
2159
2160 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
2161 {
2162
2163 unsigned char newMask;
2164
2165 int iobase = self->io.fir_base; /* or sir_base */
2166
2167 IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __func__ , enable);
2168
2169 /* Enable the interrupt which we wish to */
2170 if (enable){
2171 if (self->io.direction == IO_XMIT)
2172 {
2173 if (self->io.speed > 115200) /* FIR, MIR */
2174 {
2175 newMask = self->ier;
2176 }
2177 else /* SIR */
2178 {
2179 newMask = UART_IER_THRI | UART_IER_RDI;
2180 }
2181 }
2182 else {
2183 if (self->io.speed > 115200) /* FIR, MIR */
2184 {
2185 newMask = self->ier;
2186 }
2187 else /* SIR */
2188 {
2189 newMask = UART_IER_RDI;
2190 }
2191 }
2192 }
2193 else /* Disable all the interrupts */
2194 {
2195 newMask = 0x00;
2196
2197 }
2198
2199 //SIR and FIR has different registers
2200 if (self->io.speed > 115200)
2201 {
2202 switch_bank(iobase, BANK0);
2203 outb(newMask, iobase+FIR_IER);
2204 }
2205 else
2206 outb(newMask, iobase+UART_IER);
2207
2208 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2209 }
2210
2211 static void SIR2FIR(int iobase)
2212 {
2213 //unsigned char tmp;
2214
2215 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
2216
2217 /* Already protected (change_speed() or setup()), no need to lock.
2218 * Jean II */
2219
2220 outb(0x28, iobase+UART_MCR);
2221 outb(0x68, iobase+UART_MCR);
2222 outb(0x88, iobase+UART_MCR);
2223
2224 outb(0x60, iobase+FIR_MCR); /* Master Reset */
2225 outb(0x20, iobase+FIR_MCR); /* Master Interrupt Enable */
2226
2227 //tmp = inb(iobase+FIR_LCR_B); /* SIP enable */
2228 //tmp |= 0x20;
2229 //outb(tmp, iobase+FIR_LCR_B);
2230
2231 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
2232 }
2233
2234 static void FIR2SIR(int iobase)
2235 {
2236 unsigned char val;
2237
2238 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
2239
2240 /* Already protected (change_speed() or setup()), no need to lock.
2241 * Jean II */
2242
2243 outb(0x20, iobase+FIR_MCR); /* IRQ to low */
2244 outb(0x00, iobase+UART_IER);
2245
2246 outb(0xA0, iobase+FIR_MCR); /* Don't set master reset */
2247 outb(0x00, iobase+UART_FCR);
2248 outb(0x07, iobase+UART_FCR);
2249
2250 val = inb(iobase+UART_RX);
2251 val = inb(iobase+UART_LSR);
2252 val = inb(iobase+UART_MSR);
2253
2254 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
2255 }
2256
2257 MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
2258 MODULE_DESCRIPTION("ALi FIR Controller Driver");
2259 MODULE_LICENSE("GPL");
2260 MODULE_ALIAS("platform:" ALI_IRCC_DRIVER_NAME);
2261
2262
2263 module_param_array(io, int, NULL, 0);
2264 MODULE_PARM_DESC(io, "Base I/O addresses");
2265 module_param_array(irq, int, NULL, 0);
2266 MODULE_PARM_DESC(irq, "IRQ lines");
2267 module_param_array(dma, int, NULL, 0);
2268 MODULE_PARM_DESC(dma, "DMA channels");
2269
2270 module_init(ali_ircc_init);
2271 module_exit(ali_ircc_cleanup);
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